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Lapsed, fee not paid

Silylated polycarbonate polymers, method of making, and articles

US 8,536,282 B2 · Assignee: Momentive Performance Materials Inc. · Inventors: Lens; Jan Pleun et al.

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Overview

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This patent is listed from its USPTO record because it passed every check. Its abstract, claims and description are being downloaded from USPTO and will appear here within days. Until then, read it in the USPTO PDF or on Google Patents.

Why it's free to use

  • The USPTO Official Gazette of November 11, 2025 lists it as expired on September 17, 2025 for an unpaid maintenance fee.
  • It isn't on any reinstatement notice published since.
  • Its 2 US relatives have also lapsed, expired or never issued.
  • We check US rights only. Check foreign counterparts before selling abroad.
FiledSeptember 8, 2009
GrantedSeptember 17, 2013
Expired (fee)September 17, 2025
Application number12/555155
Classification (CPC)C07F7/0838
Length21 pages

Drawings 1

All 1 drawing sheet from the published document, cropped to the drawing.

Sheet 1 of 1

Claims

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The claims are being downloaded from USPTO and will appear here within days. Until then, read it in the USPTO PDF or on Google Patents.

Description

On its way

The description is being downloaded from USPTO and will appear here within days. Until then, read it in the USPTO PDF or on Google Patents.

Timeline & family

Timeline From USPTO dates

2007200920112013201520172019202120232025Earliest priority dateDec 22, 2006Application filedSep 8, 2009Application publishedDec 31, 2009Patent grantedSep 17, 20133.5-year fee paidMarch 17, 20177.5-year fee paidMarch 17, 202111.5-year fee not paidMarch 17, 2025Patent expiredSep 17, 2025

Maintenance fees

Fees are due 3.5, 7.5 and 11.5 years after grant. This patent expired on September 17, 2025, so the fee marked "not paid" was the one that went unpaid.

3.5-year feeDue March 17, 2017Paid
7.5-year feeDue March 17, 2021Paid
11.5-year feeDue March 17, 2025Not paid

US family 3 documents, by filing date

Published applicationUS 2008/0306294 A1

Silylated polycarbonate polymers, method of making, and articles

Filed Dec 2007 · published Dec 2008
Published application
Published applicationUS 2009/0326181 A1

Silylated polycarbonate polymers, method of making, and articles

Filed Sep 2009 · published Dec 2009
Published application
This documentUS 8,536,282 B2

Silylated polycarbonate polymers, method of making, and articles

Filed Sep 2009 · granted Sep 2013
Lapsed, fee not paid

Earlier publications, parents and continuations. None of them can still be enforced, or this patent would not be listed.

US patents it cites 0

No US citations on record.

Sources & verification

Verification

  • The USPTO Official Gazette of November 11, 2025 lists it as expired on September 17, 2025 for an unpaid maintenance fee.
  • It isn't on any reinstatement notice published since.
  • Its 2 US relatives have also lapsed, expired or never issued.
  • Rechecked against USPTO records every day.
  • We check US rights only. Check foreign counterparts before selling abroad.

Confirm it yourself

  1. Open the file history on Patent Center.
  2. The status should read "Patent Expired Due to NonPayment of Maintenance Fees Under 37 CFR 1.362".
  3. Check the documents for any later petition to revive or reinstate.

Official USPTO records

USPTO Official GazetteNotice of Expiration of Patents Due to Failure to Pay Maintenance Fee, issue of November 11, 2025.Where this listing came fromMaintenance fee recordEnter the patent number to see its fee history.USPTO FeesFull published documentText and every drawing sheet as a PDF.USPTOFile historyStatus, office actions, notices, fee records and petitions.USPTO Patent CenterPatent Public Search recordSearchable full text and bibliographic data.USPTO

Cross-check elsewhere

Google PatentsWorldwide family, citing patents and legal events.patents.google.comJustia PatentsFull text, claims and classification.patents.justia.comFreePatentsOnlineFull text and PDF.freepatentsonline.comEspacenetForeign family and legal status.European Patent Office

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